Method and device for removal of a hydrate plug
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United States of America Patent
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Aug 16, 2016
Grant Date -
Nov 27, 2014
app pub date -
Jan 9, 2013
filing date -
Jan 10, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
A method for removal of a hydrate plug (7) in a tube (92) in connection with a petroleum well (9) is described. A hydrate plug remover (2) is included having a collecting container (21). The method includes the steps of positioning the hydrate plug remover (2) in a sluice (5); filling the sluice (5) with a hydrate dissolving fluid; filling the collecting container (21) provided with a valve (3) in the lower end portion (20) of the collecting container (21) with hydrate dissolving fluid through the valve (3); pressure testing the sluice (5); displacing the hydrate plug remover (2) from the hydrate plug (7) and letting the hydrate dissolving fluid flow towards the hydrate plug (7) through a circulation gate (22) in the upper end portion (29) of the collecting container (21); leading loosened hydrate from the hydrate plug (7) into the collecting container (21) via the valve (3); and displacing the hydrate plug remover (2) to the sluice (5) where the collecting container (21) is emptied of hydrate through the circulation gate (22) while hydrate dissolving fluid flows into the collection container (21) through the valve (3). A hydrate plug remover for performing the method is also described.
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